Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec6d6e59eae743e…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 05:56:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b6343029d96f0e99df5f486c2f954500 SHA-1: 702357977c911d627ea6fd275daf8bcd9f7ea55e SHA-256: 7ec6d6e59eae743e6ab63deaa603dc5f0b866c029bdfdc7021e2c32a369e3675
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is https://netcdn.tw/app/431946152/free-robux-inspect-element-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/free-robux-inspect-element-2021-game-hack In PDF document text
    • http://grupodin.com.br/images/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/auto-clicker-free-roblox-shinobi-life_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-hacks-in-island-life-roblox_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F7C 27080 bytes
SHA-256: 44c50b16bdb7f3362432b7fd571f2e05619118466a7ebab4da13d40f7db85bec
font_01_sfnt_off00008d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D86 19032 bytes
SHA-256: b5881607a59ab0ece6e2bf7b363f23ff4e1fe76275cb149133d32107ca6585d4

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